Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0a2355aa0439a2d69859ef16302fbf738ab50d8849226985dab29a78031bc51f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^